Alert archive / Ohio / Mesoscale Discussions in 2016

Mesoscale Discussion 1389

July 24, 201617 counties in Ohio; 9 counties in Pennsylvania; 4 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2016, 3:54 PM EDT for 17 counties in Ohio; 9 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jul 24, 2016, 3:54 PM EDT (19:54 UTC)
Expired
Jul 24, 2016, 6:30 PM EDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 30 counties

Belmont County, OH, Champaign County, OH, Clark County, OH, Fairfield County, OH, Franklin County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Licking County, OH, Madison County, OH, Miami County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Shelby County, OH, Allegheny County, PA, Armstrong County, PA, Cambria County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV

The radar

The Cleveland radar (KCLE), 130 km from the middle of the area, began a volume at 19:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 7.9 hours before the alert went out and 151 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2016-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2016-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2153 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 24, 1:03 PM EDTMesoscale DiscussionSPCAshland, Carroll, Columbiana, Coshocton, Crawford, Harrison and 8 more2 hr

Nearby

Mesoscale Discussions in Ohio, 2016Mesoscale Discussions in Pennsylvania, 2016Mesoscale Discussions in West Virginia, 2016Every mesoscale discussion in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.